Why are the space crafts and probes we send out, so slow? Why can't we refuel in orbit and lift off again? And get going?
I have found on the net that the fastest a rocket has travelled is:-Is 3000 m/s about the fastest we have for chemical exhaust V?
The rocket exhaust does not push against the air. Air just gets in the way of the plume, reducing its potential velocity.I think a rocket pushes on the atmosphere it creates in space,
Tsiolkovsky's rocket equation works for all rockets whether in the atmosphere or in a vacuum. There are subtle differences but they are not important.Does that rocket equation apply for all rockets everywhere?
Right before lift-off, is the rocket V...zero....or is it set at earth's rotational V?